[PATCH] Char: mxser_new, do not null driver_data

driver_data are initialzed to NULL from tty layer, no need to do it in the
driver.  In this case it cases oops, since driver_data may be NULL for a short
while for another closing process.
Signed-off-by: NJiri Slaby <jirislaby@gmail.com>
Cc: <osv@javad.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/char/mxser_new.c

@@ -927,9 +927,6 @@ static int mxser_open(struct tty_struct *tty, struct file *filp)
 	struct mxser_port *info;
 	int retval, line;
 
-	/* initialize driver_data in case something fails */
-	tty->driver_data = NULL;
-
 	line = tty->index;
 	if (line == MXSER_PORTS)
 		return 0;